Magneto driving mechanism.



1. A. WILLIAMS. MAGNETO DRIVING MECHANISM. APPLICATION FILED DEC. 26, I911 N T D STATES PATENT OFFICE.

JOSEPH A. WILLIAMS, OF CLEVELAND, OHIO, ASSIG-NOR TO K. W. IGNITION COMPANY,"

OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

MAGNETO DRIVING MECHANISM.

To all whom it may concern Be it known that I, JOSEPH A. WILLIAMS, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State ofOhio, have invented a certain new and useful Improvement in Magneto Driving. Mechanism, of which the following is a full, clear,'and exact description;

1 The object qf this invention is to provide efficient means by which, when an internal combustion eiigine is slowly turned over, the magneto associated therewith willbe compelled to give a'suceession of quick forward movements that will result in the production of kick-oil sparks in the engine cylinders; but which will become inoperative for this purpose-when the engine has fairly started, and has attained a suitable speed, after which the magneto will run regularly in proper synchronisin with the engine.

The invention includes a spring which is interposed between the armature shaft and the driving, member. means for temporarily preventing the armature shaft from turning while the driving member is being turned and is therel'iy'putting the spring under tension, and means whereby when the driving member has been turned through part of a revolution, it will cause the withdrawal of said holding means,.and permit the tensioned spring to turn' the armature shaft quickly forward until it catches up with the driving Inen1ber,-sa1d quick forward movementproducmg a kickoff" spark in an en- I gine cylinder.

The invention in a practically el'licient form is shown in the drawing, s hereinafter described, and the novel combinations of ed. Fig. 3

parts constituting the invention are set forth .in the appended claims.

In the drawing, Figure his an end elevation of the'invent on when the parts thereof are in. the position they occupy when the en inc-is runnin Fi 2 is av similar view view.

Referring to the parts by letters, A rep- Y resents the armature shaft of the magneto.

Specification of Letters Patent. Patented June 22 1915, Application filed December 26, 1911. Serial No. 667,613. v v

vC represents a fixture which is secured to one of the side frame members in which this shaft is journaled.

B represents the driving member which is in the form of a sleeve rotatably mounted on the shaft A, and having the housing '6 which overhangs a sleeve D which is fixed to the shaft A. This sleeve D has a disk at which 1s oflarger diameter than the diameter of the housing 6. A volute spring F is ar-.

ranged within the housing Z) d is n e ted-at its ends with said housing, and with the sleeve D. The disk (Z also carries a spring pawl E having a V-shaped end which is adapted to fit into a V-shaped notch b on the housing I).

The driving member is to be connected by suitable mechanism with the crank shaft of the engine with which the magneto is to be used. The gear H which is fixed to the member B may be a part of the train of gearing which may be employed for this purpose. Under normal working conditions, the rotary motions of the driving member B will be transmitted to the armature Shaft A through the spring F,the spring pawl E serving to definitelyfix the relative positions of these parts.

Pivoted to the fixture C is a dog G having periphery of the disk (1. This dog has above.

its pivot an arm gwhich is adapted to be engagged by one end of the latch lever J where" by the dog is'held out of operative position as shown in Fig. 1." The dog G has also-ia 'n arm g which when the tooth'g is engaging with the shoulder (Z will lie in the pathof a knockout arm K which is fixed to the housing 2). In order to use this mechanism to produce the kick off sparks in the engine cylinder, the operator turns the latch lever J to the position shown in Fig. 2, whereupon the dog will swing downward so that its itooth g engages the periphery of the disk D.

Then the operator, as he slowly turns over the engine, will turn the housing I) in the direction indicated by the arrow on Fig. 2,

thereby turningalso the disk (1 until the shoulder d"thereof engages the t fl of 5 shaft of a ma slowly turned over.

the dog G. This dog will prevent the disk D and consequently the armature shaft from turning; and as the driving member B is still further turned, the spring F will be put under tension, and this will continue until the knock-off arm K is turned around and hits the arm g of the dog G. By this engagement, the dog will be pushed outward and disengaged from shoulder d. Thereupon since the armature shaft is now free from restraint, it will be turned rapidly for: ward by the tensioned spring F, and this rapid movement will continue until the armature shaft has caught up with the rotatable member B. By this quick forward movement of the armature shaft, the kick oIi sparks will beproduced In order that the dpvice may not be racked by this quick movement,' a spring buffer M is provided. This is a short plunger which is movably mounted in a lug d fixed to the disk cl and projecting through this lug' into a position Where it may engage the kick-off arm K when the disk (Z has caught up with the housing 6. The spring m which resists the movement of this buffer plunger which results from its contact with the kick-0E arm, is also utilized to impart the required engaging movement tothe pawl E, said spring being compressedbetween the shoulder on the buffer and the tail of the pawl E.

The described movement of the parts will be repeated as long as the engine is being "When, however, the engine gets fairly started and attains a suitable speed, the blows from the knock ofl" arm K against the arm 9 of the dog will be suflicientlgv forceful ,to swing the dog out so far that the'latch J will fly down behind the upper end g of the dog, and thereby .hold' it in inoperative position substantially as shown in Fig. 1.

A spring N of the rat trap variety, may be employed to impart to the latch its movement in the latching direction and also to impart to thedog some force tending to supplement the action of gravity in moving-this dog to the position where it will en 'age with t e shoulder d. i e

my invention, I claim: 1. The combination with the armature etc, of a driving member concentric with;thelshaft, said driving mem- Having described her having an enlarged cup shaped portion, a coiled. springsurrounding the'shaft andwithin said 'cup shaped portion of the driving member, said spring being cper-atively connected at opposite ends to the driving shaft and the driving member, a device for preventirigrotation of the armature shaft, and meanscarried by the driving member for displacing stautially as described.

2. The combination with the. armature shaft of a magneto, a concentric driving -rela-tively to the driving member,

said preventing device, submember, a spring pawl carried by one of said members and having a beveled end which enters a beveled notch in the other member, and a spring through which motion is transmitted from the driving member to the armature shaft, of a device to temporarily prevent the turning of said armature shaft, means carried by the driving member for moving said device to an inoperative position whereby the armature shaft may move quickly forward by said spring spring buffer for yieldingly stopping said and a forward movement of the armature shaftrelative to the driving member. I

3. The combination with the armature shaft of a magneto, a concentric driving member, and a spring through which motion is transmitted from the latter to the former of a disk fixed to the armature shaft an provided with a shoulder, a dog pivoted to a fixture for engagement with said shoulder, and a knock out arm carried by said driving member and adapted to move said dog out of engagement with said shoulder.

4. The combination with the armature shaft of a magneto, a concentric driving member, and a spring through which motion is transmitted from the latter to the former, a disk fixed to the armature shaft and provided with a shoulder, a dog pivoted to a fixture for engagement with said shoulder, a knock out arm carried by said driving member and adapted to move said dogout of engagement with said shoulder, and a spring bufl'er carried by the disk and adapted to engage said knock out arm.

The combination with the armature shaft of a magneto, a concentric driving member and a spring through which motion is transmitted from the latter to the former, a disk fixed to the armature shaft and provided with a shoulder, a dog pivoted to a fixture for engagement with said shoulder, a. knock out arm carried by said driving member and adapted to move said dog out of engagement with said shoulder, a buffer plunger movablymounted in a lug carried byv said disk in position to engage said knock out arm, a pawl carried by said disk and having a ,evelcd end adapted to engagea beveled notch in the driving member, and a spring interposed between said bufi'er plunger and pawl and acting on both. p

6. The combination with thearmature shaft of a magneto, a'hub provided with a disk fixed to said shaft, a d rotatablymounted on the shaft and having a housing which overhangs lute spring within saidhousing, and its ends fixed thereto and housing having a V-shaped notch in its eriving member.

said hub a v0.

aving to said hub, sai

riphery, a spring pawl mounted on the dlsk and having a dog pivoted to afixture an having a tooth adapted to engage a shoulder on said disk, said do also having an arm, a knock out arm fixe to said housing I in a position to engage with the said arm of the dog and a spring latch adapted to automatically engage said dog and hold it in an inoperative position when it has been moved to that position by the impact of said knock out arm against the arm of the Witnesses: H. R. SULLIVAN,

E. L. Tmmswon. 

